Mollusks from Pliocene and Pleistocene seep deposits in Leyte, Philippines Author Kiel, Steffen Author Aguilar, Yolanda M. Author Kase, Tomoki text Acta Palaeontologica Polonica 2020 2020-08-28 65 3 589 627 http://dx.doi.org/10.4202/app.00756.2020 journal article 10.4202/app.00756.2020 1732-2421 12195258 3B7C70AD-CC73-44D5-921E-B1BA0503FC29 Bathymodiolus securiformis Okutani, Fujikura, and Sasaki, 2004 Fig. 2A, B . 2004 Bathymodiolus securiformis sp. nov ; Okutani et al. 2004: 105 , figs. 4C, D, 7C, D, 8, 9. 2005 Bathymodiolus securiformis Okutani, Fujikura and Sasaki, 2004 ; Sasaki et al. 2005: 94 , fig. 5E. 2019 Bathymodiolus securiformis Okutani, Fujikura and Sasaki, 2004 ; Kuo et al. 2019: 355 , fig. 4. Material .— Liog-Liog Point, Pliocene: five specimens , NMNS PM 28133 , 28175 , 28203–28205 (L = 118.8 mm , Fig. 2A, B ), NMNS PM 28203 , and four unnumbered specimens. Antipolo Point , Pleistocene : an isolated right valve, NMNS PM 28169 (L = 129.1 mm ) . Remarks .—The Pliocene Philippine specimens reported here differ somewhat from the extant Bathymodiolus securiformis from the Okinawa Trough by having a slightly longer anterior portion of the shell. The genetically closest species to B. securiformis , B. tangaroa Cosel and Marshall, 2003 , is less slender, and its subspecies B. tangaroa tuerkayi Cosel and Janssen, 2008 is broader on the posterior side ( Cosel and Marshall 2003 ; Okutani et al. 2004 ; Cosel and Janssen 2008 ). Fig. 2. Bathymodiolin bivalves from Pliocene (B, C, Liog-Liog Point) and Pleistocene (A, Antipolo Point) seep deposits in Leyte, Philippines. A , B . Bathymodiolus securiformis Okutani, Fujikura, and Sasaki, 2004 . A . NMNS PM 28169, a right valve. B . NMNS PM 28202, an articulated specimen in dorsal view (B 1 ), exterior of left valve (B 2 ). C . The unidentified bathymodiolin, NMNS PM 28170, outside of right valve (C 1 ), specimen in dorsal (C 2 ), ventral (C 3 ), and anterior (C 4 ) views. Stratigraphic and geographic range .—Pliocene: Leyte , Philippines . Recent: Okinawa Trough.